Hi,
I've been looking for some info on these transmitters /receivers for a while, but a cant find info about how they work,
I mean - how is it able to read 4 pins with only 1 data pin, or can it support PWM, ir is it just digital HIGH/LOW?
I would be very thankful to anyone who can shed some light on the subject!
Absolutely yes 
you`de just send over the Analog data as a number, although you May have to parse the 10 bits with 2 right shifts (>>2) to make it an 8 bit number, and then just send that as a value btween 0 and 255.
there is a specific Library for those transmitters as well!
They`re very simple to use, the 4 pins are usually GND, +5V, Data In, and Antenna, the RX units are the same except it`s data Out instead.
I personally find that 1200 baud is the best for the units I use, and the range is roughly 30 metres (in a domestic setting).
they do like a little preable on transmit too, it can be anything really, what That does is "wake up" the RX unit so it can lock onto the signal, after that it`s easy.
so the TX units data pin goes to the arduinos TX pin, and the RX units data pin goes to the RX pin.
couldn`t be easier 
"
there is a specific Library for those transmitters as well!
"
Could you please point to the library you are using?? Thanks!
Regards, Terry King
...On the Mediterranean in Italy
